Telephone system.



H. P, CLAUSEN. TELEPHONE SYSTEM.

' APPLICATION FILED JULY 2.1911. 11;? 6&1.

TL M yen for.-

- Henry P (ML/5e. b v

. Patented Apr. 30, 1918.

IIE

(ll-Ill. [I'll TEEN ELEC 752,113

='; is a. foil, clear, conise, and exact .iyion relates. to teiephonc pairiicuioi'ly to arrangements brooch exchange systems chino switching apparatus is used.

- object of: "he invention ii; to provide means whereby :1. number oi: normally independent iioee may be instantly linked togeti'i enii the Suiiiecribers of such lines m onec o. oooieronce over the telephone...

Accomiio 3 certain iines of connector apparatus ore of file invention, .icc ii to e e; iciol set in muitipie, through to each, so i'hzit, iii." ticot, they ii-.3 be her. According to .ciz. in busy at the time that i this motive tone p ced 'thei'eon Warning parties Who are mimic, has .c for the pi" pose o conversing "511 3 e epcoizii caii is beiogmtmde, and that iiiey shook}, 'ihoreiii on release the lines 0- such eoioi. service.

iii; is: thoi" time The invention will best be rmriermooci o ....(1LHCQ to the accompanying dorm"5.21; in whiciii iwi'ohoi'inoiiy indepen'ciei'xt Fines wi ii their oomieot-ions are diagrammo 1y shown.

sooete ion 5% and o. eubsia'tion S are 40 shown both bowing id ntical circuits. The substation 5:7 mm? be reached through the ilfiiflfiiniiif; 2 5 and in any suitubie type of automatic switch. The substation may be rcaei 25. though terminals 1, and I) in a simiim' manner. The brushes I5 and 5 moves the brushes: of the con necior e'ivitch Wuieh adopted. to travel over mid ijooke "0113311651 with the various i'er minofis ".ioi'ii "i" snbeciiliier at Siil- 59 izioo 56 w; hie receiver from the ewii: a circuit from ggioood, the ntiiog' of line l'eiay LE Lilfiz Roi-me} contact and. inner right hand armature of reioy T the inner right- 5 hand. armature and contact of cutoff relay invei'ziiioo., coo-ii of;

special set of tor; v

Specification of Letters Patent.

'Foibenteei A m".

implication filed July 2, 191?. eerie]. Ho. wove.

CO to and. 'izhi'oogh the apparatus; of the substation .55 the contact and outer right hand armature of cutofi relay CU, the outer right-hand armature and normal contact of relay .1, the righbhand Winding of relay LL1 to battery and ground. Relay LE energized, in this circuit and serves in any Well known mz'imier to actuate e iine finder Switch, which will extend the calling line to an idle eeieeilor or connector vitch, and, through [he meni' imiation of ehe dial D a connection may be thereupon. established. Similoraction may he had in the case of substation S through the energization of relay LE A connection extended. to the brushes Z1, 2: end b of the connector switch, and placed, on terminals if". i and F, for instance, will seize the Kine of substation S and. "iii'lTO'UiIil 5L battery coonection to the brush 2'), will energize the eu'toi'iieluy EU. The estao lishmem of such e connection. is 'weii known those skiiicd in the art, and need not further be described, opt to shite om the ciii'oii f relay (DU has an odi'iitio'iiai or mo bore '3' meme of which :i ciistincfiive Lone is p1aee i on file subscriber-"e line, Wii} be hereinafter ciescribed.

Assume now that e. subscriber in tli'itiifl'liily over those at, substations S and. S Wishes iio. oeii' those parties for conference Jii.i'- posesQ Ti'irouglii proper manipulation of his coiling device, he will direct, The brushes if, b 111:1 b to the terminuis Z58 and I Aesm'oing the substation 53 to be busy and the substation S to i idle. then a. circuit is esabiishe '1 from the bnti'eiry connection to brush Z), the terminal t", though the ivinniing of reiz y T- to ground. wi'ier'eupon the relay T Wiii actuate its orn'mtm'es mid eetoblish :1. circuit from ground, battery, the secondary Winding of induction coii 1 (he .ie'fb-imiofi mmoitme and contact of relay 3, the left-hand. mi'natiii'e and. :i iieinn'ie cow tacit of relay CU to the upper side of the line ieoc iing' 'to -3Ui3SiL3IiLiOU The irinmry of ihe induction coii. 1 is eomiecceri fee a. source of alternating cuiTont of such choroo'tei' that distinctive tone is ')l'0(iii0i:i '3;he1'eiiy ':mc1 the subscriber at 99, hearing iii-his receiver this tone, recognizes the fact that his superior" oiiicc'e okinp; o specioi conference coil, and ihei'eup'on releases his connection. The eniaofi' relay (3 i thereupon retracts ii e ermoturee and the iioilowi'ziig op erations are carried out, which are similar to the operations of the apparatus associated With the substation S after the relay '1 has been energized.

A circuit is established from a source of ringing current through the relay TR, the normal contact and inner right-hand armature of relay LE alternate contact and inner right-hand armature of relay T the inner right-hand armature and contact of relay CO to and through the signaling apparatustof the substation S the contact and outer right-hand armature of relay CO, the outer righthand armature and alternate contact of relay T the outer right-hand armature and normal contact of relay LE to ground. The current traveling through this path is not suiiieient to cause the actuation of the tripping relay TR until the subscriber S removes his receiver from its hook. When this occurs, relay TR becomes energized, attracts its armatures, and sets up a circuit from ground, the armature and contact of relay TR, the right-hand winding of relay Lit" to battery and ground. Relay Lh, thereupon attracts its arniaturcs and aeircuit is established from ground, the

lefthand winding of relay L t, the alternate contact and inner right-hand armature of relay LR, the alternate conlact and inner right-hand armature of relay T the in ner right-hand armature and contact of relay C0, to and through the apparatus at the substation S, the contact and outer right-hand armature of relay C0 the outer right-hand armature and alternate contact of relay T, the outer rightdiand armature and alternate contact of relay LE the right-hand winding of relay LR tobattery and ground. In this manner, relay LR is placed under control of the line terminating in substation S and such substation is supplied with talking current through the windings thereof.

At the same time, battery potential is placed on the third conductor of the line from ground, battery, the secondary winding of induction coil 1, the left-hand armature and contact of relay T, the left-hand armature and normal contact of relay CO, to the third or test conductor of this line. It should be noted here that this battery potential is insullieient to cause the eiierg'ization of relay C0, but is sutlieient to prevent the seizure of this line by a connector switch through the terminals t, t and t Condensers C, C (1 and C are placed between the connector switch represented by the brushes 6 ,0 and b and the lines of incense all" lays LR and LR" are released, and, upon the removal of the brushes 6, b and b from the terminals t, It and 25, the lines are again placed in their normal conditions.

'What is claimed is:

, 1. In a telephone system, a connector switch, a plurality of normally independent lines terminating therein, means including said switch for extendin a connection to each of said lines separate y, and means also including said switch for automatically extending a connection to all of said lines as a group.

In a telephone system, a connector switch, a plurality of normally independent lines terminating therein, means including said switch for extending a connection to each of said lines separately, and means also including said switch for simultaneously and automatically extending; a connection to all of said lines as a group.

3.111 a telephone system, a connectorswitch, a plurality of normally independent lines, means for preventing the extension of a' connection to a busy one of said lines, and means including said switch for extending a connection to said plurality of lines as a group.

l. In a telephone system, a plurality of normally independent lines, automatic switches for intercomiecting said lines, means for preventing the extension of a connection to a busy one of said lines, means including said automatic switches for extending a connection to said plurality of lines as a group, and means for signaling a busy one of said lines.

5. In a telephone system, a plurality of normally independent lines, automatic switches for int erconnecting said lines, means including said automatic switches for extending connections to said lines separately, means including said automatic switches for extending eonnegtions to said lines as a group, means for preventing the extension ot a connection to a busy one of said lines,

and meansresponsive lo the means for cstablishing a group connection for signaling a busy one of said lines.

In witness whereof, l hereunto subscribe my name this 29th day of June A. 1)., 1917.

HENRY P. CLAUSEN. 

